SYSTEM, DEVICE, METHOD AND PROGRAM FOR AUTHENTICATING COMMUNICATION PARTNER BY MEANS OF ELECTRONIC CERTIFICATE INCLUDING PERSONAL INFORMATION

摘要

[PROBLEMS TO BE SOLVED] It is an object to provide a technique for authenticating a communication partner by means of an electronic certificate including personal information. [MEANS FOR SOLVING THE PROBLEMS] When a client device receives a request of an electronic certificate from a server device, the client device reads out a client certificate including personal information and a server public key from a storing unit and encrypts the client certificate by using the server public key. Further, the client device sets a predetermined item in a basic region of the electronic certificate showing that the electronic certificate is temporary digital evidence and makes out a temporary electronic certificate by setting the encrypted client certificate in an expanded region of the electronic certificate. The client device then transmits the temporary electronic certificate to the server device.